1 /*
2 * Copyright (c) 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /*
35 * Check database for strange configurations on default principals
36 */
37
38 #include "kadmin_locl.h"
39 #include "kadmin-commands.h"
40
41 static int
get_check_entry(const char * name,kadm5_principal_ent_rec * ent)42 get_check_entry(const char *name, kadm5_principal_ent_rec *ent)
43 {
44 krb5_error_code ret;
45 krb5_principal principal;
46
47 ret = krb5_parse_name(context, name, &principal);
48 if (ret) {
49 krb5_warn(context, ret, "krb5_unparse_name: %s", name);
50 return 1;
51 }
52
53 memset(ent, 0, sizeof(*ent));
54 ret = kadm5_get_principal(kadm_handle, principal, ent, 0);
55 krb5_free_principal(context, principal);
56 if(ret)
57 return 1;
58
59 return 0;
60 }
61
62
63 static int
do_check_entry(krb5_principal principal,void * data)64 do_check_entry(krb5_principal principal, void *data)
65 {
66 krb5_error_code ret;
67 kadm5_principal_ent_rec princ;
68 char *name;
69 int i;
70
71 ret = krb5_unparse_name(context, principal, &name);
72 if (ret)
73 return 1;
74
75 memset (&princ, 0, sizeof(princ));
76 ret = kadm5_get_principal(kadm_handle, principal, &princ,
77 KADM5_PRINCIPAL | KADM5_KEY_DATA);
78 if(ret) {
79 krb5_warn(context, ret, "Failed to get principal: %s", name);
80 free(name);
81 return 0;
82 }
83
84 for (i = 0; i < princ.n_key_data; i++) {
85 size_t keysize;
86 ret = krb5_enctype_keysize(context,
87 princ.key_data[i].key_data_type[0],
88 &keysize);
89 if (ret == 0 && keysize != (size_t)princ.key_data[i].key_data_length[0]) {
90 krb5_warnx(context,
91 "Principal %s enctype %d, wrong length: %lu\n",
92 name, princ.key_data[i].key_data_type[0],
93 (unsigned long)princ.key_data[i].key_data_length);
94 }
95 }
96
97 free(name);
98 kadm5_free_principal_ent(kadm_handle, &princ);
99
100 return 0;
101 }
102
103 int
check(void * opt,int argc,char ** argv)104 check(void *opt, int argc, char **argv)
105 {
106 kadm5_principal_ent_rec ent;
107 krb5_error_code ret;
108 char *realm = NULL, *p, *p2;
109 int found;
110
111 if (argc == 0) {
112 ret = krb5_get_default_realm(context, &realm);
113 if (ret) {
114 krb5_warn(context, ret, "krb5_get_default_realm");
115 goto fail;
116 }
117 } else {
118 realm = strdup(argv[0]);
119 if (realm == NULL) {
120 krb5_warnx(context, "malloc");
121 goto fail;
122 }
123 }
124
125 /*
126 * Check krbtgt/REALM@REALM
127 *
128 * For now, just check existance
129 */
130
131 if (asprintf(&p, "%s/%s@%s", KRB5_TGS_NAME, realm, realm) == -1) {
132 krb5_warn(context, errno, "asprintf");
133 goto fail;
134 }
135
136 ret = get_check_entry(p, &ent);
137 if (ret) {
138 printf("%s doesn't exist, are you sure %s is a realm in your database",
139 p, realm);
140 free(p);
141 goto fail;
142 }
143 free(p);
144
145 kadm5_free_principal_ent(kadm_handle, &ent);
146
147 /*
148 * Check kadmin/admin@REALM
149 */
150
151 if (asprintf(&p, "kadmin/admin@%s", realm) == -1) {
152 krb5_warn(context, errno, "asprintf");
153 goto fail;
154 }
155
156 ret = get_check_entry(p, &ent);
157 if (ret) {
158 printf("%s doesn't exist, "
159 "there is no way to do remote administration", p);
160 free(p);
161 goto fail;
162 }
163 free(p);
164
165 kadm5_free_principal_ent(kadm_handle, &ent);
166
167 /*
168 * Check kadmin/changepw@REALM
169 */
170
171 if (asprintf(&p, "kadmin/changepw@%s", realm) == -1) {
172 krb5_warn(context, errno, "asprintf");
173 goto fail;
174 }
175
176 ret = get_check_entry(p, &ent);
177 if (ret) {
178 printf("%s doesn't exist, "
179 "there is no way to do change password", p);
180 free(p);
181 goto fail;
182 }
183 free(p);
184
185 kadm5_free_principal_ent(kadm_handle, &ent);
186
187 /*
188 * Check for duplicate afs keys
189 */
190
191 p2 = strdup(realm);
192 if (p2 == NULL) {
193 krb5_warn(context, errno, "malloc");
194 goto fail;
195 }
196 strlwr(p2);
197
198 if (asprintf(&p, "afs/%s@%s", p2, realm) == -1) {
199 krb5_warn(context, errno, "asprintf");
200 free(p2);
201 goto fail;
202 }
203 free(p2);
204
205 ret = get_check_entry(p, &ent);
206 free(p);
207 if (ret == 0) {
208 kadm5_free_principal_ent(kadm_handle, &ent);
209 found = 1;
210 } else
211 found = 0;
212
213 if (asprintf(&p, "afs@%s", realm) == -1) {
214 krb5_warn(context, errno, "asprintf");
215 goto fail;
216 }
217
218 ret = get_check_entry(p, &ent);
219 free(p);
220 if (ret == 0) {
221 kadm5_free_principal_ent(kadm_handle, &ent);
222 if (found) {
223 krb5_warnx(context, "afs@REALM and afs/cellname@REALM both exists");
224 goto fail;
225 }
226 }
227
228 foreach_principal("*", do_check_entry, "check", NULL);
229
230 free(realm);
231 return 0;
232 fail:
233 free(realm);
234 return 1;
235 }
236